Can I publish on Pronoun if my book is already published?

I have a published ebook

You can use Pronoun to distribute your ebook anywhere it isn’t already live. For example, if your ebook is currently available on Amazon and iBooks, you can use Pronoun for Barnes & Noble, Kobo, Google Play, OverDrive, and/or Bibliotheca.

Please note that we can’t distribute your ebook to a retailer where it’s already live. For example, if you currently sell your book on Kobo, you’d need to remove that version from sale before distributing that book to Kobo through Pronoun.

Please see this article for more information about what happens to books that are removed from sale and republished on Pronoun.